Dallinger/Dallinger: 4.0.0

Feature Python 3 support (tested with Python 3.6.4)

Feature Add MultiRecruiter for mixed human-bot participants

Feature New dallinger hits command lists all Mechanical Turk HITs associated with an experiment ID

Feature New dallinger expire command expires all Mechanical Turk HITs associated with an experiment ID

Feature New --expire-hit option to dallinger destroy will expire any associated Mechanical Turk HITs prior to destroying the deployed experiment server

Feature Support for high performance bots which interact with the experiment server via HTTP requests or other backend means rather than via a browser + Selenium

Feature Jupyter Notebook widget displays the experiment name, configuration, and status

Feature New index page at the server's root url (/) displays the experiments active configuration

Feature Size configuration of Heroku's Redis add-on via the redis-size config variable (defaults to premium-0)

Feature New config parameter assign_qualifications to expand experimenter qualification options

Automatically put Flask server in debug mode if the experiment is run in that mode

Improvements to exception handling and error reporting

Show an alert if dallinger2.js and the legacy dallinger.js are loaded together on the same page

Cleanup git status, psycopg2 warnings, and tests

Increase MTurk bump timeout from 30 to 60 seconds

Miscellaneous bug fixes